"No benefit for HDD bound workloads" This means no benefit over regular MySQL releases, not to say that MySQL doesn't have some nice features. InnoDB can read

"No benefit for HDD bound workloads" This means no benefit over regular MySQL releases, not to say that MySQL doesn't have some nice features. InnoDB can read/write in multiple threads - which is useful on RAID controllers which require concurrency to exploit all their throughput. Newer SSDs also like concurrent writes. Compare this to at least MongoDB which uses a single reader/writer thread.